1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pochemuha
3 years ago
8

Solve the simultaneous equation 4x-y=9 2x-3y= -23

Mathematics
1 answer:
MrMuchimi3 years ago
4 0

Answer:

x = 5

y = 11

Step-by-step explanation:

y = 4x - 9

2x -3(4x - 9) = -23

2x - 12x + 27 = -23

-10x = -23 -27

-10x = -50

minus cancels out

x = 5

y = 4(5) -9

y = 20 - 9

y = 11

You might be interested in
The value of a certain car after one year was $13,595. The value of the same car after 3 years was $11,095. Find the slope and e
Oksanka [162]

Answer:

-1250/1 or -1250

This tells us that the car depreciated in value by $1250 every year.

Step-by-step explanation:

11,095-13,595= -2500

This is the value that the car has depreciated over 2 years (from the first year to the third year)

Since we need to find the slope we divide this value by two.

That value would be -1250

Since the value is negative, we know the car has depreciated in value. We also now know that it depreciated in value by $1250 every year

Hope this helps!

7 0
3 years ago
5/7(x - 9) = 25; x =<br> I need help quick!
irina1246 [14]

Answer:

x=44

Step-by-step explanation:

3 0
2 years ago
Which of the following could not be a value of n? side lengths of 9 and 13
daser333 [38]
The correct answer here would be D. And that is because, in a triangle, the sum of 2 of the sides has to be greater than the third side for all sides.  If we add 22 and 13 we get 35, and 35 is greater than 9, for sure. But if we add 13 and 9 we get 22 which is not greater than the third side length of 22; it would be collinear with the side length and it has to be greater than the side length.
8 0
3 years ago
Last year, the numbers of skateboards produced per day at a certain factory were normally distributed with a mean of 20,500 skat
alisha [4.7K]

Answer:

This can be solved by using the empirical rule for a normal distribution.

Step-by-step explanation:

A. The number of skateboards given is one standard deviation above the mean. Approximately 68% of the data points lie within the range plus and minus one standard deviation of the mean. Therefore the required percentage is:

68 + 16 = 84%.

B. The given number of skateboards is two standard deviations above the mean. Approximately 95% of the data points lie within the range plus and minus two standard deviations of the mean. Therefore the required percentage is:

5/2 = 2.5%

C.The given number of skateboards is one standard deviations below the mean. Therefore the required percentage is:

16%.

8 0
3 years ago
suppose a radioactive substance decays according to the equation y=200e^-0.75t, where y represent the mass in gram after t hours
Daniel [21]

Answer:

i am not sure

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • HELP!!! A plumber charges a fee of $25 plus $30 per hour on the job. Make a table of values for the total charge depending on th
    11·1 answer
  • MATH QUESTION!!!!!!!!!!!!!!!!!!!!!!!
    11·2 answers
  • How do i solve ? <br><br> 6v-13v-18= -81
    13·1 answer
  • What is the solution
    9·1 answer
  • Write 5,364,879,967 in word form
    13·2 answers
  • The pythagorean theorem and maps answer key
    5·2 answers
  • ⚠️⚠️⚠️NO ONE HAS HELPED ME! PLEASE I Need HELP QUICK!⚠️⚠️⚠️ —complete the following punnett square, show the genotype produced b
    6·1 answer
  • What is the slope of the line that passes through the points (-9, 2)(−9,2) and (1, 27) ?(1,27)? Write your answer in simplest fo
    6·1 answer
  • The length of a rectangle is 5 less than twice the width, and the area of the rectangle is 52 ft^2. Find the dimensions of the r
    12·1 answer
  • The city of Raleigh has 6200 registered voters. There are two candidates for city council in an upcoming election: Brown and Fel
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!